13 mm Drill Size

metric drill

13 mm 0.5118 in 13.00 mm

A 13 mm drill measures 0.5118 in. It taps 3 threads in this chart.

What a 13 mm drill taps

Every thread this drill cuts between 50% and 85% of thread, deepest first. Outside that band it is the wrong drill for the job, so nothing below that line is listed.

Threads a 13 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
9/16-18	70.3%	33/64″	65.0%
M14 x 1.25	61.6%	12.8 mm	73.9%
M14 x 1.5	51.3%	12.5 mm	77.0%

Other jobs for a 13 mm

Hard-material tap drill: The size to use in stainless or tool steel for M14 x 1.25, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

12.9 mm 0.5079 in · 12.9 mm Next size down
33/64″ 0.5156 in · 13.1 mm Next size up

All drill sizes → · Open this drill in the calculator →

13 mm drill: common questions

What size is a 13 mm drill?

0.5118 inches, which is 13.00 mm. It is a metric drill.

What can I tap with a 13 mm drill?

3 threads: 9/16-18 at 70.3%, M14 x 1.25 at 61.6%, M14 x 1.5 at 51.3%.

What drill is next to a 13 mm?

Down: 12.9 mm at 0.5079 in. Up: 33/64 in at 0.5156 in.